Added some files

internal/logging/logger.go

@@ -0,0 +1,104 @@
+package logging
+
+import (
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+var (
+	// Logger is the global logger instance
+	Logger *zap.Logger
+
+	// SugaredLogger is the global sugared logger instance
+	SugaredLogger *zap.SugaredLogger
+)
+
+// Init initializes the logger with the specified level and config
+func Init(level string, jsonOutput bool) {
+	var config zap.Config
+
+	// Set the log level
+	logLevel := zap.NewAtomicLevel()
+	err := logLevel.UnmarshalText([]byte(level))
+	if err != nil {
+		logLevel.SetLevel(zap.InfoLevel)
+	}
+
+	if jsonOutput {
+		// JSON output for Grafana Loki
+		config = zap.Config{
+			Level:       logLevel,
+			Development: false,
+			Sampling:    nil,
+			Encoding:    "json",
+			EncoderConfig: zapcore.EncoderConfig{
+				MessageKey:     "msg",
+				LevelKey:       "level",
+				TimeKey:        "time",
+				NameKey:        "logger",
+				CallerKey:      "caller",
+				FunctionKey:    zapcore.OmitKey,
+				StacktraceKey:  "stacktrace",
+				SkipLineEnding: false,
+				LineEnding:     zapcore.DefaultLineEnding,
+				EncodeLevel:    zapcore.LowercaseLevelEncoder,
+				EncodeTime:     zapcore.ISO8601TimeEncoder,
+				EncodeDuration: zapcore.StringDurationEncoder,
+				EncodeCaller:   zapcore.ShortCallerEncoder,
+			},
+			OutputPaths:      []string{"stdout"},
+			ErrorOutputPaths: []string{"stderr"},
+			InitialFields:    map[string]interface{}{"service": "music-server"},
+		}
+	} else {
+		// Human-readable output for development
+		config = zap.Config{
+			Level:       logLevel,
+			Development: true,
+			Sampling:    nil,
+			Encoding:    "console",
+			EncoderConfig: zapcore.EncoderConfig{
+				MessageKey:     "msg",
+				LevelKey:       "level",
+				TimeKey:        "time",
+				NameKey:        "logger",
+				CallerKey:      "caller",
+				FunctionKey:    zapcore.OmitKey,
+				StacktraceKey:  "stacktrace",
+				SkipLineEnding: false,
+				LineEnding:     zapcore.DefaultLineEnding,
+				EncodeLevel:    zapcore.CapitalLevelEncoder,
+				EncodeTime:     zapcore.ISO8601TimeEncoder,
+				EncodeDuration: zapcore.StringDurationEncoder,
+				EncodeCaller:   zapcore.ShortCallerEncoder,
+			},
+			OutputPaths:      []string{"stdout"},
+			ErrorOutputPaths: []string{"stderr"},
+			InitialFields:    map[string]interface{}{"service": "music-server"},
+		}
+	}
+
+	logger, err := config.Build()
+	if err != nil {
+		panic(err)
+	}
+
+	Logger = logger
+	SugaredLogger = logger.Sugar()
+}
+
+// GetLogger returns the global logger
+func GetLogger() *zap.Logger {
+	if Logger == nil {
+		Init("info", false)
+	}
+	return Logger
+}
+
+// GetSugaredLogger returns the global sugared logger
+func GetSugaredLogger() *zap.SugaredLogger {
+	if SugaredLogger == nil {
+		Init("info", false)
+	}
+	return SugaredLogger
+}